LTC3889IUKG#TRPBF Analog Devices Integrated Circuit (Quad Flat No-Lead) In Stock
Analog Devices LTC3889IUKG#TRPBF is a dual-output synchronous step-down DC/DC controller with PMBus interface, operating from 5 V to 60 V input at 500 kHz switching frequency in a 46-pin QFN package. Current-mode PWM control delivers fast transient response for server, telecom, and industrial power systems.
- Manufacturer
- Analog Devices
- Package
- Quad Flat No-Lead
- Pin Count
- 52
- Lifecycle
- ACTIVE
- Datasheet
- LTC3889IUKG#TRPBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $12.3900(MOQ 1)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LTC3889IUKG#TRPBF?
- Dual-output synchronous buck controller operating over 5 V to 60 V wide input range for versatile multi-rail power designs
- PMBus digital interface enabling real-time telemetry of voltage, current, and temperature for intelligent power management
- Current-mode PWM control at 500 kHz for fast load transient response and precision output regulation
- Compact 46-pin QFN with exposed pad for low thermal resistance in high-power density server and telecom applications
What is LTC3889IUKG#TRPBF used for?
The LTC3889IUKG#TRPBF is designed for dual-rail power supply designs in server blade cards, FPGA power trees, and telecom infrastructure equipment where PMBus-controlled output voltages and real-time current monitoring are required from a wide 5 V to 60 V bus. Its 500 kHz current-mode PWM control enables tight output regulation across heavy load transients in industrial motor drive controllers and high-reliability data centre power systems.
What are the specifications of LTC3889IUKG#TRPBF?
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1947 |
| Date Of Intro | 2018-11-16 |
| YTEOL | 9 |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 60V |
| Input Voltage-Min | 5V |
| Input Voltage-Nom | 16V |
| JESD-30 Code | R-PQCC-N46 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Voltage-Max | 40V |
| Output Voltage-Min | 1V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | LCC46/52,.28X.32,20 |
| Package Shape | RECTANGULAR |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 400kHz |
| Technology | CMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Thailand |
Where can I find the LTC3889IUKG#TRPBF datasheet?
LTC3889IUKG#TRPBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LTC3889IUKG#TRPBF?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What input voltage range does LTC3889IUKG#TRPBF support and which bus architectures does this enable?
The LTC3889IUKG#TRPBF accepts input voltages from 5 V to 60 V, covering 12 V, 24 V, and 48 V intermediate bus architectures used in server power distribution, telecom -48 V bus (with polarity inversion), and industrial 24 V panel supplies. This wide input range allows a single controller to serve multiple system designs without redesigning the power stage.
How does the PMBus interface on LTC3889IUKG#TRPBF benefit system-level power management?
The PMBus digital interface allows a host processor or BMC to read real-time telemetry including output voltage to ±0.5% accuracy, inductor current, and die temperature over a standard 2-wire SMBus connection at up to 400 kHz. It also allows dynamic output voltage adjustment and fault logging, which is essential for data centre servers requiring intelligent rack-level power monitoring and sequencing.
What switching frequency does LTC3889IUKG#TRPBF use and how does this affect output filter component size?
The LTC3889IUKG#TRPBF switches at 500 kHz, which allows the use of smaller inductors (typically 0.47 µH to 2.2 µH) and output capacitors compared to 200 kHz designs. At 500 kHz, a typical 1.8 V output stage for an FPGA core rail can use a 1 µH inductor and 3 x 100 µF ceramic capacitors, fitting in less than 15 mm² of board area per output.
When is LTC3889IUKG#TRPBF preferred over a simpler single-output buck controller for an FPGA power design?
When a design requires simultaneous regulation of two FPGA power rails (such as a 1.0 V core and 1.8 V I/O) with digitally programmable output voltages, sequencing, and current sharing monitored over PMBus, the LTC3889IUKG#TRPBF replaces two separate controllers and reduces BOM count. Its dual-output capability from a single 46-pin QFN also saves approximately 30% of PCB area compared to two discrete single-output controllers in separate packages.
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About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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|---|---|---|
| 1+ | $19.5700 | $19.57 |
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